I know a certain amount of "seasoning" makes your cast iron cool, but this piece seemed to be pretty corroded. Last summer my wife and I were in Charleston,SC and we visited the CSA Hunley--the world's first submarine used during the Civil War. This pan looked like it had been pulled from the wreckage.
Check it out. The 8 tells you that it's an 8" pan.
So now what? I found help from the Pan Man who has a guide on his site for cleaning and seasoning old cast iron. Step one is to spray the piece down with oven cleaner all over and stick it in a plastic trash bag for a couple of days. Keeping it in the bag keeps the cleaner from evaporating. Stay tuned as I post the progress of this project.